Document aJB3YD4DmkyOw2pEvGOYwgmXM

April 24, 1964 CONFIDENTIAL William Weingarten, M.D. Nassau Smelting and Refining Company 1 Nassau Place Staten Island 7, New York (10307) Dear Doctor Weingarten: I enclose herewith two copies of the report of the results of analyses of a second series of samples of the urine and blood of a group of employees of the Nassau Smelting and Refining Company. I do not know how these men were dealt with, and perhaps I should say that it will be useful to me and will enable me to give you the benefit of a more satisfactory interpretation of the findings obtained hereafter, if you willhhave the facts in such matters indicated on the request sheet. As to the usefulness of such information to me, let me merely remark that while we consider it worthwhile to perform services of this type to responsible people in industry, our purpose is to learn as much as we can in this manner as to the effects of the disposition of the men, including any therapy that may be administered. This is the means of our learning what to expect in dealing with future problems of industrial hygiene. j You will note, with satisfaction, I believe, that the present series of results give evidence of a considerable decrease in the levels of the con centration of lead in the urine and blood of all of these men. I assume that the men were simply removed from the operations in which they had been engaged prior to the collection of the previous specimens. It is important to the interpretation of the significance of this decrease to know whether the occupational exposure of these workmen to lead was terminated completely, or whether they were moved to a seemingly less hazardous exposure. In any case, however, the extent of the decrease, especially that in the blood, suggests, without wholly proving the case, that the total quantities of lead accumulated in the bodies of these men - the so-called "burden" of lead - were not unusually large^lfoi^wiDLalso note, I am sure, that while the findings in the case of diminished considerably, this man is right on the edge of a potentially dangerous level of lead concentration in his blood. He should not be reinstated in his former work. Nor indeed should the other men be so reinstated unless the conditions associated with their earlier work have been considerably improved, for, otherwise, they will 0018727 William Weingarten, M.D. - (2) - April 24, 1964 return to their former condition, with respect to the concentrations of lead m urine and hlood within a short time. Cordially yours. RAKivr Enel. ~ 4 Robert A. Kehoe, M.D. HE 0018728 R eported: 4-25-64 S> t-* l: Hg 0018729 ss co 2 c0 <a C' cr 3 H* 3 H 0n *i5 ct- &ct ** e* ** &Sb W 4r CJ I o *> M a H Ch 3 3I O H* ON 3 4Sr 0 m CT5 3 H O' P. <j 0<4 aO tfl- 0 3U M 'a *3 sj * 3 aO <4 W O O' M H sScr IB m> ca 0 *13 O' *-> O 0 o O V, O CO r?a 0 >3 cr * *** 0 M :S5 0 3 H* e-o -'j.<03 *. Pj Ci- S5 O 3 :2 < K3 O0 *5 sr 0 mc o \ji 03 O3 -'5 0 M cr 0 P. N19729.01